However, what data is published openly should be carefully weighed against privacy, safety, and security concerns. In many cases, the publishing of such data will be clearcut as the data may already be published elsewhere. However, grey areas will always exist. Data published or intended for one audience may also be of use to others with more nefarious plans. Having large amounts of data organized in one place naturally eliminates barriers to access but also makes to use for people that intend to do harm--potentially making their job easier.
Satellite imagery, especially if refreshed frequently, can be especially sensitive. Terrorist groups have long been known to use open sources of geographic information and applications such as Google Earth to facilitiate attacks.
Some solutions are obvious but given the diverse security threat, the risks of open publishing may not always be readily apparent.